Results 111 to 120 of about 97,482 (247)

Search for the Wreckage of Air France Flight AF 447

open access: yes, 2014
In the early morning hours of June 1, 2009, during a flight from Rio de Janeiro to Paris, Air France Flight AF 447 disappeared during stormy weather over a remote part of the Atlantic carrying 228 passengers and crew to their deaths.
Keller, Colleen M.   +3 more
core   +1 more source

A comparison of recreational and survey‐grade side‐scan sonar systems in mapping reservoir fish habitat

open access: yesNorth American Journal of Fisheries Management
Littoral zone aquatic habitat is an important component of sport fish population dynamics in freshwater lakes and reservoirs and is a primary target of fisheries management actions. However, habitat data for these systems are often minimal or nonexistent
Taher Fletcher   +2 more
semanticscholar   +1 more source

Method for shaping and aiming narrow beams [PDF]

open access: yes, 1981
A sonar method and apparatus is discribed which utilizes a linear frequency chirp in a transmitter/receiver having a correlator to synthesize a narrow beamwidth pattern from otherwise broadbeam transducers when there is relative velocity between the ...
Heyser, R. C.
core   +1 more source

The Two-Dimensional Wavelet Transform De-noising and Combining with Side Scan Sonar Image

open access: yesJournal of Applied Geospatial Information, 2017
This paper puts forward an image de-noising method based on 2D wavelet transform with the application of the method in seabed identification data collection system.
Muhammad Zainuddin Lubis   +2 more
doaj   +2 more sources

Rethinking the Patch Test for Phase Measuring Bathymetric Sonars [PDF]

open access: yes, 2011
While conducting hydrographic survey operations in the Florida Keys, NOAA Ship Thomas Jefferson served as a test platform for the initial operational implementation of an L-3 Klein HydroChart 5000 Swath Bathymetry Sonar System1 , a hull-mounted phase ...
Beaudoin, Jonathan   +3 more
core   +1 more source

Fairy circle landscapes under the sea

open access: yes, 2017
Short-scale interactions yield large-scale vegetation patterns that, in turn, shape ecosystem function across landscapes. Fairy circles, which are circular patches bare of vegetation within otherwise continuous landscapes, are characteristic features of ...
Duarte, Carlos M.   +5 more
core   +1 more source

Dual-Path Residual "Shrinkage" Network for Side-Scan Sonar Image Classification. [PDF]

open access: yesComput Intell Neurosci, 2022
Ruan F   +5 more
europepmc   +1 more source

Assessing Bottom Gear Impact in the WGOM Closure Area: A Multifaceted Approach [PDF]

open access: yes, 2007
Mashkoor Malik presented the results of a UNH Center for Coastal and Ocean Mapping (CCOM) study of the seafloor of the WGOMCA. Objectives The objectives for the CCOM study were to: • Construct a bathymetric map of Jeffrey’s Ledge to serve as a framework ...
Malik, Mashkoor A., Mayer, Larry A.
core   +1 more source

Data handling methods and target detection results for multibeam and sidescan data collected as part of the search for SwissAir Flight 111 [PDF]

open access: yes, 1999
The crash of SwissAir Flight 111, off Nova Scotia in September 1998, triggered one of the largest seabed search surveys in Canadian history. The primary search tools used were sidescan sonars (both conventional and focussed types) and multibeam sonars ...
Bradford, Jim   +5 more
core   +1 more source

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